温室能够有效改善茄科作物(包括番茄、辣椒、茄子等)生长过程,温室环境控制策略对作物实现高效高产至关重要。为了充分利用国内外的研究成果、促进我国温室环境控制策略的研究应用,分别从常规比例微积分(Proportional Integral Derivati...温室能够有效改善茄科作物(包括番茄、辣椒、茄子等)生长过程,温室环境控制策略对作物实现高效高产至关重要。为了充分利用国内外的研究成果、促进我国温室环境控制策略的研究应用,分别从常规比例微积分(Proportional Integral Derivative,PID)控制、模糊控制、人工智能控制、温室小气候模型和作物生长模型等5个方面,综述了温室环境控制策略的研究进展。针对目前我国该领域存在的问题,提出了今后应将智能温室控制与作物生长模型耦合,构建智慧型作物生长模型;针对不同区域作物的生长预测,与遥感技术进行结合,增强模型的普适性,形成具有中国特色的温室环境控制策略。展开更多
以D-果糖和L-天冬氨酸单钾盐为原料合成了2-L-天冬氨酸-2-脱氧-D-葡萄糖,利用傅里叶变换红外光谱、~1H核磁共振(nuclear magnetic resonance,NMR)、^(13)C NMR和高分辨率质谱技术进行结构表征。应用热重-微商热重和在线裂解气相色谱/质...以D-果糖和L-天冬氨酸单钾盐为原料合成了2-L-天冬氨酸-2-脱氧-D-葡萄糖,利用傅里叶变换红外光谱、~1H核磁共振(nuclear magnetic resonance,NMR)、^(13)C NMR和高分辨率质谱技术进行结构表征。应用热重-微商热重和在线裂解气相色谱/质谱联用技术分别研究了2-L-天冬氨酸-2-脱氧-D-葡萄糖的热失重和热裂解行为。采用1,1-二苯基-2-三硝基苯肼(1-diphenyl-2-picrylhydrazyl,DPPH)自由基清除法和还原能力法对其体外抗氧化活性进行测定。结果表明:合成产物为目标化合物;目标化合物的裂解温度为187.8℃,700℃时总失重达到91.26%;目标化合物裂解产物的数量随温度的升高而增多,裂解产物包括杂环类、酮类、羧酸类、醛类、酚类、烯烃类、醇类和芳烃类等化合物,裂解产物表现出烘焙香、甜香、焦甜香、可可香、花香和奶香等香韵;目标产物具有较强的DPPH自由基清除能力和还原能力,是一种潜在的抗氧化剂。展开更多
The phytochrome gene family, which is in Arabidopsis thaliana, consists of phytochromes A-E(phyA to phyE), regulates plant responses to ambient light environments. PhyA and phyB have been characterized in detail, bu...The phytochrome gene family, which is in Arabidopsis thaliana, consists of phytochromes A-E(phyA to phyE), regulates plant responses to ambient light environments. PhyA and phyB have been characterized in detail, but studies on phyC to phyE have reported discrepant functions. In this study, we show that phyD regulates the Arabidopsis gravitropic response by inhibiting negative gravitropism of hypocotyls under red light condition. PhyD had only a limited effect on the gravitropic response of roots in red light condition. PhyD also enhanced phyB-regulated gravitropic responses in hypocotyls. Moreover, the regulation of hypocotyl gravitropic responses by phyD was dependent upon the red light fluence rate.展开更多
文摘温室能够有效改善茄科作物(包括番茄、辣椒、茄子等)生长过程,温室环境控制策略对作物实现高效高产至关重要。为了充分利用国内外的研究成果、促进我国温室环境控制策略的研究应用,分别从常规比例微积分(Proportional Integral Derivative,PID)控制、模糊控制、人工智能控制、温室小气候模型和作物生长模型等5个方面,综述了温室环境控制策略的研究进展。针对目前我国该领域存在的问题,提出了今后应将智能温室控制与作物生长模型耦合,构建智慧型作物生长模型;针对不同区域作物的生长预测,与遥感技术进行结合,增强模型的普适性,形成具有中国特色的温室环境控制策略。
文摘以D-果糖和L-天冬氨酸单钾盐为原料合成了2-L-天冬氨酸-2-脱氧-D-葡萄糖,利用傅里叶变换红外光谱、~1H核磁共振(nuclear magnetic resonance,NMR)、^(13)C NMR和高分辨率质谱技术进行结构表征。应用热重-微商热重和在线裂解气相色谱/质谱联用技术分别研究了2-L-天冬氨酸-2-脱氧-D-葡萄糖的热失重和热裂解行为。采用1,1-二苯基-2-三硝基苯肼(1-diphenyl-2-picrylhydrazyl,DPPH)自由基清除法和还原能力法对其体外抗氧化活性进行测定。结果表明:合成产物为目标化合物;目标化合物的裂解温度为187.8℃,700℃时总失重达到91.26%;目标化合物裂解产物的数量随温度的升高而增多,裂解产物包括杂环类、酮类、羧酸类、醛类、酚类、烯烃类、醇类和芳烃类等化合物,裂解产物表现出烘焙香、甜香、焦甜香、可可香、花香和奶香等香韵;目标产物具有较强的DPPH自由基清除能力和还原能力,是一种潜在的抗氧化剂。
基金supported by funds from the Genetically Modified Organisms Breeding Major Projects of China (2011ZX08010-002)the National Natural Science Foundation of China (30871438 and 31170267)the Natural Science Foundation of Xinjiang, China (2012211B49)
文摘The phytochrome gene family, which is in Arabidopsis thaliana, consists of phytochromes A-E(phyA to phyE), regulates plant responses to ambient light environments. PhyA and phyB have been characterized in detail, but studies on phyC to phyE have reported discrepant functions. In this study, we show that phyD regulates the Arabidopsis gravitropic response by inhibiting negative gravitropism of hypocotyls under red light condition. PhyD had only a limited effect on the gravitropic response of roots in red light condition. PhyD also enhanced phyB-regulated gravitropic responses in hypocotyls. Moreover, the regulation of hypocotyl gravitropic responses by phyD was dependent upon the red light fluence rate.